Dettol is a houshold cleaning disinfectant usually used when mopping the floor or for tipping down the sink or into an outside drain.
The idea of using grit and dettol goes back to the first world war and was popularly touted as a cure for syphilis and other sexually transmitted diseases. The idea being that one should retract any foreskin, grit the teeth and apply dettol in large quantity to the head of the penis. This would result in pain, very much pain. The effectiveness of this popular cure is in doubt but certainly the myth endures in popular culture. Though rarely is there anyone brave enough to try it
Man with a girl like that you dont know what you might get. I suggest you use grit and dettol.